Anatase TiO2-pillared hexaniobate mesoporous nanocomposite with enhanced photocatalytic activity

Xu, Bai-Huan; Lin, Bi-Zhou; Wang, Qinqin; Pian, Xue-Tao; Zhang, Ou; Fu, Li-Mei

doi:10.1016/j.micromeso.2011.06.003

Cited by 23 publications

(6 citation statements)

References 31 publications

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“…The DRS spectra of g-C 3 N 4 photocatalysts derived from different precursors at different temperatures are depicted in Fig 7 , where it can be found that all the samples have strong visible-light absorption edge around 450 nm, implying that all g-C 3 N 4 photocatalysts exhibit visible-light response. Moreover, the band gap ( E g ) of g-C 3 N 4 photocatalysts was determined by the method reported in previous publication [ 52 ]. As shown in the insets in Fig 7 , the E g values of g-C 3 N 4 derived from dicyandiamide range from 2.56 eV to 2.76 eV and those from melamine range from 2.60 eV to 2.75 eV, coinciding to the literature review by Qiao’s group [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Zhao

et al. 2015

PLoS ONE

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Graphitic carbon nitride (g-C3N4) used in this work was obtained by heating dicyandiamide and melamine, respectively, at different temperatures. The differences of g-C3N4 derived from different precursors in phase composition, functional group, surface morphology, microstructure, surface property, band gap and specific surface area were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-visible diffuse reflection spectroscopy and BET surface area analyzer, respectively. The photocatalytic discoloration of an active cationic dye, Methylene Blue (MB) under visible-light irradiation indicated that g-C3N4 derived from melamine at 500°C (CN-M500) had higher adsorption capacity and better photocatalytic activity than that from dicyandiamide at 500°C (CN-D500), which was attributed to the larger surface area of CN-M500. MB discoloration ratio over CN-M500 was affected by initial MB concentration and photocatalyst dosage. After 120 min reaction time, the blue color of MB solution disappeared completely. Subsequently, based on the measurement of the surface Zeta potentials of CN-M500 at different pHs, an active anionic dye, Methyl Orange (MO) was selected as the contrastive target pollutant with MB to reveal the synergic effect between adsorption and photocatalysis. Finally, the photocatalytic mechanism was discussed.

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Section: Resultsmentioning

confidence: 99%

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Zhao

et al. 2015

PLoS ONE

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“…Hence, the photogenerated electrons might be transferred from MB to Na 2 Ti 3 O 7 and thus, Na 2 Ti 3 O 7 shows a photocatalytic activity under visible light irradiation even though it has no light absorption in visible light region [59]. After hybridizing titanate with TiO 2 , the resulted TTO-6 shows an enhanced photocatalytic activity than the pure Na 2 Ti 3 O 7 due to the formation of heterojunction and thus, the effective spatial separation of photogenerated electron-hole pairs [60]. By comparison, N-TTO-6-2 shows a further significantly enhanced photoactivity than TTO-6, indicating that N doping essentially tunes the electric structure of TTO-6 and thus, further effectively enhances the photocatalytic performance [61,62].…”

Section: Uv-vis Diffuse Reflectance Spectramentioning

confidence: 99%

N-doped Na2Ti6O13@TiO2 core–shell nanobelts with exposed {1 0 1} anatase facets and enhanced visible light photocatalytic performance

Liu

Sun

et al. 2015

Applied Catalysis B: Environmental

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“…Layered nanohybrids (NHs) by pillaring semiconducting nanoparticles such as CdS, α-Fe2O3, and TiO2 [21][22][23][24] into layered inorganic compounds [25][26][27][28][29][30] have recently drawn growing attention in photocatalysis, due to their large surface area as well as suppressed electronhole recombination because of electron transfer between guest and host. 22,23,31 Titanate nanosheets (Ti0.91O2) derived from delamination of layered compounds have unique structural characteristic of ultimate two-dimensional anisotropy with extremely small thickness in the subnano-to nanometer scales, which leads to new physical and chemical properties for nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Porous Titania Nanosheet/Nanoparticle Hybrids as Photoanodes for Dye-Sensitized Solar Cells

Bai

Zheng

et al. 2013

ACS Appl. Mater. Interfaces

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Porous titania nanohybrids (NHs) were successfully prepared by hybridizing the exfoliated titania nanosheets with anatase TiO2 nanoparticles. Various characterizations revealed that the titania NHs as photoanodes play a trifunctional role (light harvesting, dye adsorption, and electron transfer) in improving the efficiency (η) of the dye-sensitized solar cells. The optimized photoanode consisting layered NHs demonstrated a high overall conversion efficiency of 10.1%, remarkably enhanced by 29.5% compared to that (7.8%) obtained from the benchmark P25 nanoparticles under the same testing conditions. ABSTRACT: Porous titania nanohybrids (NHs) were successfully prepared by hybridizing the exfoliated titanate nanosheets with the anatase TiO2 nanoparticles. Various characterizations revealed that the titania NHs as photoanodes play a tri-functional role (light harvesting, dye-adsorption and electron transfer) in improving the efficiency (η) of the DSSCs. The optimized photoanode consisting layered NHs demonstrated a high overall conversion efficiency of 10.1%, remarkably enhanced by 29.5% compared to that (7.8%) obtained from the benchmark P25 nanoparticles under the same testing conditions.

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Anatase TiO2-pillared hexaniobate mesoporous nanocomposite with enhanced photocatalytic activity

Cited by 23 publications

References 31 publications

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

N-doped Na2Ti6O13@TiO2 core–shell nanobelts with exposed {1 0 1} anatase facets and enhanced visible light photocatalytic performance

Porous Titania Nanosheet/Nanoparticle Hybrids as Photoanodes for Dye-Sensitized Solar Cells

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